package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Transactional
    @Override
    public void save(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        List<SetmealDish> setmealDish = setmealDTO.getSetmealDishes();

        // 新增套餐
        setmealMapper.insert(setmeal);
        Long id = setmeal.getId();
        // 新增套餐对应菜品
        setmealDish.forEach(setmealDish1 -> {
            setmealDish1.setSetmealId(id);
        });
        setmealDishMapper.insert(setmealDish);

    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 删除套餐
     * @param ids
     */
    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        // 先检验要删除的套餐都是禁售状态
        ids.forEach(id ->{
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });

        // 进行套餐删除
        ids.forEach(setmealId -> {
            // 删除套餐表中的数据
            setmealMapper.deleteById(setmealId);
            // 删除套餐菜品关系表中的数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });
    }

    /**
     * 根据id获取套餐数据
     * @param id
     * @return
     */
    @Override
    public SetmealVO getById(Long id) {
        // 获取对应套餐数据
        Setmeal setmeal = setmealMapper.getById(id);
        // 获取对应的套餐菜品关系数据
        List<SetmealDish> setmealDishes = setmealDishMapper.getSetmealDishesBySetmealId(setmeal.getId());
        // 数据合并 返回
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 跟新套餐和套餐关系数据
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        // 更新对应的套餐表
        setmealMapper.update(setmeal);

        // 更新对应套餐菜品关系数据 先删除后添加
        setmealDishMapper.deleteBySetmealId(setmealDTO.getId());
        setmealDishMapper.insert(setmealDTO.getSetmealDishes());

    }

    /**
     * 启停售套餐
     * @param status
     * @param id
     */
    @Override
    public void StartOrStop(Integer status, Long id) {
        // 起售套餐时候，需要判断套餐内部是否含有停售菜品 有停售菜品提示“套餐内包含未启售菜品，无法启售”
        if(status == StatusConstant.ENABLE) {
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if(dishList != null && dishList.size() > 0) {
                dishList.forEach(dish -> {
                    if(StatusConstant.DISABLE == dish.getStatus()) {
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal = Setmeal.builder()
            .id(id)
            .status(status)
            .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 根据套餐id查询菜品列表
     * @param id
     * @return
     */
    @Override
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    @Override
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }
}
